Unsp fx upper end of right ulna, subs for clos fx w nonunion

This code indicates an unspecified fracture of the upper portion (proximal end) of the right ulna that has failed to heal properly after an initial treatment, and the patient is now presenting for further care. "Nonunion" signifies that the bone fragments have not united after a sufficient healing period.

This code is appropriate for follow-up encounters where a patient with a previously treated closed fracture of the right proximal ulna is diagnosed with nonunion. This would include visits for evaluation of the nonunion, planning for revision surgery, or ongoing management of the unhealed fracture.

• Ensure documentation clearly states "nonunion" and specifies the right ulna and its upper end.
• Verify that the fracture was initially closed; open fractures have different subsequent encounter codes.
• Do not use this code for initial encounters or for fractures that are healing normally.